It is said that lightning may start _____big fire in the forest.
题目
It is said that lightning may start _____big fire in the forest.
A.an B.the C.a D./
应该选c还是d,
答案
C
泛指一般意义的“火”,是不可数名词.如：Paper catches fire easily.纸很容易着火.The house was completely destroyed by fire.房子被大火全毁了.2.表示具体意义的“火灾”或“炉火”等,是可数名词.如：A fire took place in that street.那条街发生了火灾.There were several fires in this city last month.上个月这个城市发生了好几起火灾.It’s too cold,and I’ll make [build,light] a fire in theroom.我要屋里生个火.
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已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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